WO2022178657A1 - 光学系统、摄像模组及电子设备 - Google Patents

光学系统、摄像模组及电子设备 Download PDF

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Publication number
WO2022178657A1
WO2022178657A1 PCT/CN2021/077404 CN2021077404W WO2022178657A1 WO 2022178657 A1 WO2022178657 A1 WO 2022178657A1 CN 2021077404 W CN2021077404 W CN 2021077404W WO 2022178657 A1 WO2022178657 A1 WO 2022178657A1
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Prior art keywords
lens
optical system
optical axis
object side
image side
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PCT/CN2021/077404
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English (en)
French (fr)
Inventor
华露
杨健
李明
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欧菲光集团股份有限公司
江西晶超光学有限公司
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Priority to PCT/CN2021/077404 priority Critical patent/WO2022178657A1/zh
Publication of WO2022178657A1 publication Critical patent/WO2022178657A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • the invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and an electronic device.
  • the replacement cycle of mobile phones has become shorter and shorter, and the shooting functions have become more and more powerful, and the market's requirements for a single type of lens have become more and more strict.
  • the market's requirements for a single type of lens have become more and more strict.
  • the telephoto lens has a longer focal length, it can obtain a shallower depth of field, so it can better deal with the details of the distant scene and achieve the imaging effect of compressing the shooting distance.
  • an optical system a camera module, and an electronic device are provided.
  • An optical system comprising in sequence from the object side to the image side along the optical axis:
  • the first lens with positive refractive power the object side of the first lens is convex at the near optical axis, and the image side is concave at the near optical axis;
  • the second lens with negative refractive power the object side of the second lens is convex at the near optical axis, and the image side is concave at the near optical axis;
  • the third lens with positive refractive power, the object side of the third lens is convex at the near optical axis;
  • the fifth lens with refractive power, the image side surface of the fifth lens is convex at the near optical axis;
  • the sixth lens with refractive power the image side of the sixth lens is concave at the near optical axis;
  • the seventh lens with refractive power the object side of the seventh lens is convex at the near optical axis, the image side is concave at the near optical axis, the object side and the image side of the seventh lens are aspherical, and the object at least one of the side face and the image side face has an inflection point;
  • optical system also satisfies the relation:
  • f is the effective focal length of the optical system
  • TTL is the distance from the object side of the first lens to the imaging plane of the optical system on the optical axis.
  • a camera module includes an image sensor and any one of the above optical systems, wherein the image sensor is arranged on the image side of the optical system.
  • An electronic device includes a fixing piece and the above-mentioned camera module, wherein the camera module is arranged on the fixing piece.
  • FIG. 1 is a schematic structural diagram of an optical system provided by a first embodiment of the present application.
  • FIG. 2 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the first embodiment
  • FIG. 3 is a schematic structural diagram of an optical system provided by a second embodiment of the present application.
  • FIG. 4 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the second embodiment
  • FIG. 5 is a schematic structural diagram of an optical system provided by a third embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an optical system provided by a fourth embodiment of the present application.
  • FIG. 8 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fourth embodiment
  • FIG. 9 is a schematic structural diagram of an optical system provided by a fifth embodiment of the present application.
  • FIG. 10 includes longitudinal spherical aberration diagram, astigmatism diagram and distortion diagram of the optical system in the fifth embodiment
  • FIG. 11 is a schematic structural diagram of an optical system provided by a sixth embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of an optical system provided by a seventh embodiment of the present application.
  • 15 is a schematic structural diagram of an optical system provided by an eighth embodiment of the present application.
  • 16 includes longitudinal spherical aberration diagrams, astigmatism diagrams and distortion diagrams of the optical system in the eighth embodiment
  • FIG. 17 is a schematic diagram of a camera module provided by an embodiment of the application.
  • FIG. 18 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • an embodiment of the present application provides an optical system 10 having a seven-piece structure.
  • the optical system 10 includes a first lens L1 , a second lens L2 , a third lens L1 , a second lens L2 , and a third lens along the optical axis 101 from the object side to the image side in sequence.
  • the lenses in the optical system 10 are arranged coaxially, that is, the optical axes of the lenses are all located on the same straight line, and the straight line may be called the optical axis 101 of the optical system 10 .
  • Each of the above-described optical elements in the optical system 10 can be assembled with a lens barrel to constitute an imaging lens.
  • the first lens L1 includes an object side S1 and an image side S2
  • the second lens L2 includes an object side S3 and an image side S4
  • the third lens L3 includes an object side S5 and an image side S6
  • the fourth lens L4 includes an object side S7 and an image side S8,
  • the fifth lens L5 includes an object side S9 and an image side S10
  • the sixth lens L6 includes an object side S11 and an image side S12
  • the seventh lens L7 includes an object side S13 and an image side S14.
  • the optical system 10 has an imaging surface S15, and the imaging surface S15 is located on the image side of the seventh lens L7.
  • the imaging surface S15 of the optical system 10 coincides with the photosensitive surface of the image sensor.
  • the imaging surface S15 can be regarded as the photosensitive surface of the image sensor.
  • the first lens L1 has a positive refractive power
  • the object side S1 is convex at the near optical axis
  • the image side S2 is concave at the near optical axis
  • the second lens L2 has a negative refractive power
  • its The object side S3 is convex at the near optical axis
  • the image side S4 is concave at the near optical axis
  • the third lens L3 has positive refractive power
  • its object side S5 is convex at the near optical axis
  • the fourth lens L4 has positive refractive power power or negative refractive power
  • the fifth lens L5 has positive refractive power or negative refractive power
  • its image side S10 is convex at the near optical axis
  • the sixth lens L6 has positive or negative refractive power, and its image side S12 is near the optical axis.
  • the optical axis is concave; the seventh lens L7 has positive refractive power or negative refractive power, the object side S13 is convex at the near optical axis, the image side S14 is concave at the near optical axis, and the object side S13 and the image side are concave.
  • S14 are all aspherical surfaces, and at least one of the object side surface S13 and the image side surface S14 has an inflection point.
  • the refractive power and surface configuration of the first lens L1 are beneficial to increase the incoming light of the optical system and improve the imaging clarity. Range; both the front and rear lenses of the second lens L2 have positive refractive power.
  • both the front and rear lenses of the second lens L2 have positive refractive power.
  • the second lens L2 have the above-mentioned refractive power and surface setting, it will be beneficial to shorten the total length of the system and promote the system to achieve aberration balance;
  • third The surface design of the lens L3 is conducive to strengthening the strength of the positive refractive power, which is conducive to correcting the aberration generated by the object lens; the design of the fifth lens L5 can also correct the aberrations such as astigmatism and distortion generated by the object lens.
  • the design of the sixth lens L6 is conducive to shortening the overall length of the system;
  • the seventh lens L7 has the above-mentioned surface design, on the one hand, it is conducive to the optical system 10 to obtain a larger image surface to match the image sensor with higher pixels, and on the other hand
  • the back focus of the optical system 10 can also be increased, so that the optical system 10 has a sufficient safety distance to avoid collision during the module assembly process.
  • the optical system 10 in the embodiment of the present application through the above number of lenses, the configuration of refractive power, and the design of the surface shape, on the one hand, can be beneficial to possessing telephoto characteristics, and on the other hand, it can also make the image generated between the lenses.
  • the aberrations are better balanced, so that the overall aberration of the optical system 10 is suppressed, and the imaging effect is more excellent.
  • the embodiments of the present application describe that a surface of the lens is convex near the optical axis
  • the area of the surface of the lens near the optical axis 101 is convex
  • the shape of the surface from the center (at the optical axis 101) to the edge direction can be purely convex;
  • the convex shape in the center transitions to a concave shape and then becomes convex near the maximum effective aperture.
  • the definition of the concave and convex features in this application is only for the surface type of the effective light-transmitting area of the corresponding lens surface.
  • the optical system 10 also satisfies the following relational conditions:
  • TTL is the distance on the optical axis from the object side S1 of the first lens L1 to the imaging surface S15 of the optical system 10 .
  • TTL is also referred to as the total optical length of the optical system 10 .
  • the optical system 10 Satisfying the above relational expression conditions is also beneficial for the optical system 10 to obtain a longer focal length to obtain telephoto characteristics, and at the same time, it is also beneficial to compress the overall length of the optical system 10 to make the optical system 10 have a relatively compact structure, thereby realizing the optical system 10. miniaturized design.
  • satisfying this relationship also helps the optical system 10 to better handle the details of the distant scene, so that the details of the focused distant scene are more prominent, so as to achieve a good telephoto imaging effect, so that the user can obtain better results. shooting experience.
  • the relationship satisfied by the optical system 10 may specifically be 1.01, 1.015, 1.02, 1.025, 1.045, 1.065, 1.078, 1.083, 1.086 or 1.09.
  • the optical system 10 further satisfies the relationship of 1.005 ⁇ f/TTL ⁇ 1.092, the above technical effect will be more significant.
  • the optical system 10 also satisfies at least one of the following relationships, and when any relationship is satisfied, it can bring corresponding technical effects:
  • Imgh is half of the image height corresponding to the maximum angle of view of the optical system 10 .
  • Imgh can also be understood as the diagonal length of the rectangular effective imaging area on the imaging surface S15. After the image sensor is assembled, Imgh can also be understood as the distance from the center of the rectangular effective pixel area to the diagonal edge of the image sensor, and the diagonal direction of the above-mentioned effective imaging area is parallel to the diagonal direction of the rectangular effective pixel area. .
  • the optical system 10 By further satisfying the condition of the relational expression, on the one hand, it can help the optical system 10 to further realize the telephoto shooting effect, and on the other hand, the optical system 10 can have a larger image surface size under the condition of maintaining the miniaturization, thereby helping the Due to the large image plane feature, the shooting details of the long-range view can be better presented, thereby improving the long-range shooting performance of the optical system 10 .
  • the relationship satisfied by the optical system 10 may specifically be 1.095, 1.1, 1.11, 1.124, 1.136, 1.149, 1.158, 1.162 or 1.165.
  • f123 is the combined focal length of the first lens L1, the second lens L2 and the third lens L3, and R12 is the radius of curvature of the image side S2 of the first lens L1 at the optical axis.
  • the positive refractive power of the lens group formed by the first three lenses in the middle is combined with the surface shape of the image side S2 of the first lens L1, so that the incident light can be well regulated when it enters the optical system 10, thereby effectively reducing the optical
  • the air gap between each adjacent lens in the system 10 reduces the overall length of the system; on the other hand, it also helps to control the surface shape of the image side S2 of the first lens L1, so as to balance the aberration generated by the image side lens.
  • the curvature radius of the image side S2 of the first lens L1 is too small, resulting in that the surface is too curved and the gap between the surface and the second lens L2 is too small, which not only increases the lens It is difficult to process and form, and at the same time, it will also lead to difficulty in assembling the lenses, and it is easy to cause too much refractive power to concentrate on the first lens L1, which increases the tolerance sensitivity of the first lens L1.
  • the curvature radius of the image side S2 of the first lens L1 is too large, resulting in an overly flat surface, which is not conducive to the correction of spherical aberration, coma and astigmatism generated by the two lenses.
  • the relationship satisfied by the optical system 10 may specifically be 1.1, 1.13, 1.18, 1.25, 1.34, 1.43, 1.47 or 1.56.
  • f567 is the combined focal length of the fifth lens L5, the sixth lens L6 and the seventh lens L7.
  • the ratio of the combined focal length of the fifth lens L5, the sixth lens L6 and the seventh lens L7 to the total effective focal length of the optical system 10 is controlled within a reasonable range, which is conducive to balancing the focal length generated by the object-side lens.
  • Spherical aberration and chromatic aberration, and by reasonably adjusting the combined refractive power of the fifth lens L5 to the seventh lens L7 the refractive power of the optical system 10 can be effectively prevented from being excessively concentrated in the rear lens group, so that the system image can be better improved. Poor corrective ability.
  • the length of the optical system 10 can be effectively reduced, and the telephoto characteristic of the optical system 10 can be highlighted at the same time.
  • the upper limit of the above relationship is exceeded, the negative refractive power provided by the rear lens group formed by the fifth lens L5, the sixth lens L6 and the seventh lens L7 is too large, so that the refractive power of the optical system 10 is excessively concentrated in the rear lens group, As a result, the ability to correct system aberrations is reduced.
  • the relationship satisfied by the optical system 10 may specifically be -2, -1.92, -1.85, -1.74, -1.53, -1.38, -1.2, -1.15, -1 or -0.95.
  • f3 is the effective focal length of the third lens L3.
  • a reasonable configuration can be obtained between the total effective focal length of the optical system 10 and the effective focal length of the third lens L3, so that the surface shape of the third lens L3 is suitable, which not only helps to reduce the incidence angle of light on the lens , the tolerance sensitivity of the third lens L3 is reduced, and it is also beneficial for the optical system 10 to have a telephoto characteristic.
  • the positive refractive power contributed by the third lens L3 is too strong, which is unfavorable to form aberration balance with the front and rear lens groups, thereby affecting the imaging quality.
  • the relationship satisfied by the optical system 10 may specifically be 1.1, 1.14, 1.18, 1.26, 1.34, 1.46, 1.49, 1.53 or 1.57.
  • ct56 is the distance from the image side S10 of the fifth lens L5 to the object side S11 of the sixth lens L6 on the optical axis
  • et56 is the maximum effective aperture of the image side S10 of the fifth lens L5 to the first The distance at which the maximum effective aperture of the object side S11 of the six-lens L6 lies in the direction of the optical axis.
  • the deflection angle of light can reduce the tolerance sensitivity of the two lenses; on the other hand, it is also conducive to the assembly between the fifth lens L5 and the sixth lens L6; in addition, it also helps to reduce the rear end of the optical system 10 size.
  • the edge gap between the fifth lens L5 and the sixth lens L6 is too small, and the edges of the two lenses are too close, increasing the risk of poor assembly.
  • the relationship satisfied by the optical system 10 may specifically be 3, 3.3, 3.8, 4.5, 5.2, 5.8, 6, 6.35 or 6.5.
  • sag61 is the sagittal height of the object side S11 of the sixth lens L6 at the maximum effective aperture
  • et6 is the maximum effective aperture of the object side S11 of the sixth lens L6 to the maximum effective aperture of the image side S12 at Thickness in the direction of the optical axis.
  • the sag of the lens surface at the maximum effective aperture is the distance from the intersection of the surface with the optical axis 101 to the maximum effective aperture in the direction parallel to the optical axis 101 .
  • the ratio between the sag of the object side S11 of the sixth lens L6 at the maximum effective diameter and the edge thickness of the sixth lens L6 can be reasonably configured, which helps to control the object side S11 of the sixth lens L6 to
  • the inclination angle at the edge enables the surface to smoothly transition from the center to the edge, so that the edge light can also transition to the next lens at a slower angle until the imaging surface S15; on the other hand, the sixth lens can also be controlled
  • the edge thickness of L6 is within a reasonable range, which is beneficial to control the thickness ratio of the entire lens so as not to be too large or too small, thereby reducing the difficulty of forming and assembling the lens.
  • the object side surface S11 of the sixth lens L6 is too curved, which is not conducive to molding and assembly.
  • the relationship satisfied by the optical system 10 may specifically be 0.5, 0.56, 0.64, 0.72, 0.81, 0.89, 0.94, 0.97 or 1.
  • the optical system 10 further satisfies the relationship of 0.455 ⁇
  • sag71 is the sagittal height of the object side S13 of the seventh lens L7 at the maximum effective aperture
  • et7 is the maximum effective aperture of the object side S13 of the seventh lens L7 to the maximum effective aperture of the image side S14 at Thickness in the direction of the optical axis.
  • the sag of the lens surface at the maximum effective aperture is the distance from the intersection of the surface with the optical axis 101 to the maximum effective aperture in the direction parallel to the optical axis 101 .
  • the value of sag71 When the value of sag71 is negative, it indicates that the position of the maximum effective aperture of the object side surface S13 of the seventh lens L7 is closer to the object side than the position of the intersection point of this surface and the optical axis 101 .
  • the ratio between the sagittal height and the edge thickness of the object side S13 of the seventh lens L7 at the maximum effective diameter is controlled within a reasonable range, so that the opening angle of the seven lenses at the lens edge can be effectively controlled, so that the The incident light can enter the seventh lens L7 at a relatively small incident angle, and smoothly pass through the seventh lens L7 to reach the imaging surface S15 , thereby facilitating the optical system 10 to achieve a large image surface characteristic, thereby significantly improving the imaging quality.
  • the relationship satisfied by the optical system 10 may specifically be -2.4, -2.2, -2, -1.84, -1.67, -1.55, -1.32, -1.26, or -1.2.
  • the optical system 10 further satisfies the relationship of -2.52 ⁇ sag71/et7 ⁇ -1.16, the above-mentioned effect will be more remarkable.
  • the relationship satisfied by the optical system 10 may specifically be 14.5, 15.3, 15.8, 16.7, 18.2, 19.5, 20.7, 21.6, 22.5 or 23.
  • the reference wavelength of the parameters related to the focal length in the conditions of the above relational expressions is 555 nm
  • the reference wavelength of the parameters related to the refractive index and Abbe number is 587.6 nm, that is, the wavelength of d light.
  • each of the above focal length parameters at least represents the focal length of the corresponding lens at the near optical axis.
  • the above relational conditions and the technical effects brought about are aimed at the seven-piece optical system 10 with the above-mentioned lens design.
  • the lens design number of lenses, refractive power configuration, surface configuration, etc.
  • the optical system 10 includes an aperture stop STO.
  • the aperture stop STO is used to control the amount of light entering the optical system 10, and at the same time, it can play a role of blocking ineffective light.
  • the aperture stop STO may be disposed on the object side of the first lens L1, or may be disposed between two adjacent lenses among the first lens L1 to the seventh lens L7.
  • the aperture stop STO is provided between the third lens L3 and the fourth lens L4.
  • the aperture stop STO may be formed of a barrel structure that holds the lens, or may be a gasket that is separately fitted between the lens and the barrel.
  • the object side and/or the image side of at least one of the first lens L1 to the seventh lens L7 are aspherical, that is, at least one of the first lens L1 to the seventh lens L7 has an aspherical surface type.
  • both the object side surface and the image side surface of the first lens L1 to the seventh lens L7 can be designed as aspherical surfaces.
  • the aspheric surface configuration can further help the optical system 10 to eliminate aberrations, and is also conducive to the miniaturized design of the optical system 10, so that the optical system 10 can have excellent optical effects while maintaining the miniaturized design.
  • the object side surface and/or the image side surface of at least one of the first lens L1 to the seventh lens L7 may also be spherical.
  • the actual surface shape of the lens is not limited to the spherical or aspherical shape shown in the drawings, which are for example reference only and are not drawn strictly to scale.
  • the surface may be a structure that exhibits a convex surface or a concave surface as a whole.
  • the surface can also be designed to have an inflection point. At this time, the surface shape of the surface will change from the center to the edge. For example, the surface is convex near the optical axis and is convex near the circumference. Concave.
  • Z is the distance from the corresponding point on the aspheric surface to the tangent plane of the surface at the optical axis
  • r is the distance from the corresponding point on the aspheric surface to the optical axis
  • c is the curvature of the aspheric surface at the optical axis
  • k is the conic coefficient
  • Ai is the coefficient of the high-order term corresponding to the i-th high-order term in the aspheric surface formula.
  • the material of each lens in the optical system 10 is plastic.
  • the material of each lens in some embodiments may also be glass.
  • the lens made of plastic can reduce the weight of the optical system 10 and the production cost, while the lens made of glass can withstand higher temperatures and have excellent optical effects.
  • the material of at least one of the first lens L1 to the seventh lens L7 is plastic, and the material of at least one is glass.
  • the material configuration relationship of the lenses in the optical system 10 is not limited to the above embodiments.
  • the material of any lens can be plastic or glass, and the specific design can be determined according to actual needs.
  • the plastic material may specifically be polycarbonate.
  • the optical system 10 further includes an infrared cut filter 110 .
  • the infrared cut filter 110 is disposed on the image side of the seventh lens L7 and is relatively fixed to each lens in the optical system 10 .
  • the infrared cut-off filter 110 is used to filter out infrared light and prevent the infrared light from reaching the imaging surface S15 of the optical system 10, thereby preventing the infrared light from interfering with normal imaging.
  • the infrared cut filter 110 may be assembled with each lens as part of the optical system 10 .
  • the infrared cut filter 110 can be installed between the optical system 10 and the image sensor together when the optical system 10 and the image sensor are assembled.
  • the infrared cut filter 110 may also be disposed on the object side of the first lens L1.
  • a filter coating layer can also be provided on at least one of the first lens L1 to the seventh lens L7 to achieve the effect of filtering out infrared light.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • 2 includes a longitudinal spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical system 10 in the first embodiment, and the reference wavelengths of the astigmatism diagram and the distortion diagram in the following embodiments are both 555 nm.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is convex near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is concave at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is convex at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is convex near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • the refractive power and surface configuration of the first lens L1 are beneficial to increase the incoming light of the optical system and improve the imaging clarity. Range; both the front and rear lenses of the second lens L2 have positive refractive power.
  • both the front and rear lenses of the second lens L2 have positive refractive power.
  • the second lens L2 have the above-mentioned refractive power and surface setting, it will be beneficial to shorten the total length of the system and promote the system to achieve aberration balance;
  • third The surface design of the lens L3 is conducive to strengthening the strength of the positive refractive power, which is conducive to correcting the aberration generated by the object lens; the design of the fifth lens L5 can also correct the aberrations such as astigmatism and distortion generated by the object lens.
  • the design of the sixth lens L6 is conducive to shortening the overall length of the system;
  • the seventh lens L7 has the above-mentioned surface design, on the one hand, it is conducive to the optical system 10 to obtain a larger image surface to match the image sensor with higher pixels, and on the other hand
  • the back focus of the optical system 10 can also be increased, so that the optical system 10 has a sufficient safety distance to avoid collision during the module assembly process.
  • the refractive power and surface configuration of the above-mentioned lenses distributed from the object side to the image side are reasonable, on the one hand, it is beneficial to have telephoto characteristics, and on the other hand, the aberrations generated between the lenses can be better balanced. , thereby suppressing the overall aberration of the optical system 10 and making the imaging effect more excellent.
  • Table 2 presents the aspheric coefficients of the corresponding lens surfaces in Table 1, where K is the conic coefficient and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric type formula.
  • the elements from the object side to the image side of the optical system 10 are arranged in order from top to bottom in Table 1.
  • the stop in the table is the aperture stop STO.
  • the surfaces corresponding to the surface numbers S1 and S2 respectively represent the object side S1 and the image side S2 of the first lens L1, that is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side.
  • the Y radius is the radius of curvature of the corresponding surface of the lens at the optical axis.
  • the absolute value of the first value of the lens in the "Thickness” parameter column is the thickness of the lens on the optical axis, and the absolute value of the second value is the image side of the lens to the surface of the following optical element (such as the latter).
  • the distance on the optical axis of the object side of the lens or the diaphragm plane), the value of the diaphragm in the "thickness" parameter represents the distance on the optical axis from the diaphragm plane to the object side of the following optical element.
  • the reference wavelength of the refractive index and Abbe number of each lens is 587.6 nm
  • the reference wavelength of the focal length is 555 nm
  • the Y radius and thickness is millimeter (mm).
  • the numerical unit of focal length (effective focal length) is millimeter (mm).
  • the relational calculation and lens structure of each embodiment are based on the data provided in the parameter tables (eg, Table 1, Table 2, Table 3, Table 4, etc.).
  • the effective focal length f of the optical system 10 is 7.75mm
  • the aperture number FNO is 2.60
  • the maximum field angle FOV is 43.57°
  • the total optical length TTL is 7.69mm.
  • the rectangular effective pixel area of the image sensor has a diagonal direction. When the image sensor is assembled, the FOV can also be understood as the maximum field angle of the optical system 10 parallel to the diagonal direction.
  • the materials of the first lens L1, the second lens L2, the fourth lens L4 and the fifth lens L5 are all glass
  • the materials of the third lens L3, the sixth lens L6 and the seventh lens L7 are all plastic
  • the optical Both the object side and the image side of each lens in the system 10 are aspherical.
  • the optical system 10 also satisfies the following relationships:
  • f/TTL 1.009.
  • it is beneficial for the optical system 10 to obtain a longer focal length to obtain a telephoto characteristic and at the same time, it is also beneficial to compress the total length of the optical system 10 to make the optical system 10 have a relatively compact structure, thereby realizing the miniaturization of the optical system 10. design.
  • satisfying this relationship also helps the optical system 10 to better handle the details of the distant scene, so that the details of the focused distant scene are more prominent, so as to achieve a good telephoto imaging effect, so that the user can obtain better results. shooting experience.
  • the positive refractive power of the lens group formed by the first three lenses in the optical system 10 can be reasonably controlled, and the surface shape of the image side S2 of the first lens L1 can be matched to make the incident light enter the optical system 10. It can be well controlled at the same time, so that the air gap between each adjacent lens in the optical system 10 can be effectively reduced, thereby reducing the total length of the system; on the other hand, it is also helpful to control the image side S2 of the first lens L1. , so as to balance the aberrations produced by the image-side lens.
  • the distance between the fifth lens L5 and the sixth lens L6 on the optical axis and the distance at the maximum effective diameter can be reasonably configured, on the one hand, it is beneficial to reduce the distance between the fifth lens L5 and the sixth lens L6.
  • the deflection angle of light can reduce the tolerance sensitivity of the two lenses; on the other hand, it is also conducive to the assembly between the fifth lens L5 and the sixth lens L6; in addition, it also helps to reduce the rear end of the optical system 10 size.
  • the opening angle of the seven lenses at the edge of the lens can be effectively controlled, so that the incident light can enter the seventh lens L7 with a smaller incident angle, and smoothly pass through the seventh lens L7 to reach the imaging surface S15, thereby It is beneficial to enable the optical system 10 to realize the characteristics of a large image plane, thereby significantly improving the imaging quality.
  • FIG. 2 includes a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the optical system 10, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens.
  • the ordinate of the longitudinal spherical aberration map represents the normalized pupil coordinate (Normalized Pupil Coordinator) from the pupil center to the pupil edge, and the abscissa represents the distance from the imaging plane to the intersection of the light and the optical axis (unit is mm). It can be seen from the longitudinal spherical aberration diagram that in the first embodiment, the degree of deviation of the converging focus of each wavelength light tends to be the same, and the smear or color halo in the imaging picture is effectively suppressed.
  • FIG. 2 also includes a field curvature diagram (Astigmatic Field Curves) of the optical system 10, wherein the S curve represents the sagittal field curvature at 555 nm, and the T curve represents the meridional field curvature at 555 nm. It can be seen from the figure that the field curvature of the optical system is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images. 2 also includes a distortion diagram (Distortion) of the optical system 10. It can be seen from the diagram that the image distortion caused by the main beam is small, and the maximum distortion is controlled within 2.5%, so it can be judged that the imaging quality of the optical system 10 is good.
  • a field curvature diagram Astigmatic Field Curves
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • FIG. 4 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the second embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is convex near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is convex at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is convex near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the second embodiment are given in Table 3 and Table 4, wherein the definitions of the names of the components and the parameters can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.05mm, and the maximum distortion is controlled within 2.5mm. %, so that the optical system 10 of this embodiment has excellent imaging quality.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with positive refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • FIG. 6 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the third embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is concave near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is concave at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is concave near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the third embodiment are given in Table 5 and Table 6, wherein the definitions of the names of the components and the parameters can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.025mm, and the maximum distortion is controlled within 2.5 mm. %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with positive refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • FIG. 8 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the fourth embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is concave near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is concave at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is concave near the circumference.
  • the object side S9 of the fifth lens L5 is convex at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is convex near the circumference, and the image side S10 is convex near the circumference.
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the fourth embodiment are given in Table 7 and Table 8, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.025mm, and the maximum distortion is controlled within 2.5 mm. %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • 10 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the fifth embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is concave near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is concave near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is convex near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the fifth embodiment are given in Table 9 and Table 10, wherein the definitions of the names and parameters of each element can be obtained from the first embodiment, and will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.025mm, and the maximum distortion is controlled within 2.5 mm. %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • FIG. 12 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the sixth embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is convex near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is convex at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is convex near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side surface S11 of the sixth lens L6 is a convex surface at the near optical axis, and the image side surface S12 is a concave surface at the near optical axis; the object side surface S11 is a concave surface near the circumference, and the image side surface S12 is a concave surface near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the sixth embodiment are given in Table 11 and Table 12, wherein the definitions of the names and parameters of each element can be obtained from the first embodiment, and will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.025mm, and the maximum distortion is controlled within 2.5 mm. %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, a lens having a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • FIG. 14 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the seventh embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is convex near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is convex at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is convex near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is convex at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is concave near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the seventh embodiment are given in Table 13 and Table 14, and the definitions of the names and parameters of each element can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.025mm, and the maximum distortion is controlled within 5 %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 sequentially includes a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, and a The third lens L3 with positive refractive power, the aperture stop STO, the fourth lens L4 with negative refractive power, the fifth lens L5 with positive refractive power, the sixth lens L6 with negative refractive power, and the sixth lens with negative refractive power Seven lens L7.
  • 16 includes longitudinal spherical aberration diagrams, astigmatism diagrams, and distortion diagrams of the optical system 10 in the eighth embodiment.
  • the object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex near the circumference, and the image side S2 is concave near the circumference.
  • the object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is convex near the circumference, and the image side S4 is concave near the circumference.
  • the object side S5 of the third lens L3 is convex at the near optical axis, and the image side S6 is convex at the near optical axis; the object side S5 is convex near the circumference, and the image side S6 is concave near the circumference.
  • the object side S7 of the fourth lens L4 is concave at the near optical axis, and the image side S8 is concave at the near optical axis; the object side S7 is concave near the circumference, and the image side S8 is convex near the circumference.
  • the object side S9 of the fifth lens L5 is concave at the near optical axis, and the image side S10 is convex at the near optical axis; the object side S9 is concave near the circumference, and the image side S10 is concave near the circumference.
  • the object side S11 of the sixth lens L6 is concave at the near optical axis, and the image side S12 is concave at the near optical axis; the object side S11 is concave near the circumference, and the image side S12 is convex near the circumference.
  • the object side S13 of the seventh lens L7 is convex at the near optical axis, and the image side S14 is concave at the near optical axis; the object side S13 is convex near the circumference, and the image side S14 is concave near the circumference.
  • lens parameters of the optical system 10 in the eighth embodiment are given in Table 15 and Table 16, wherein the names of the components and the definitions of the parameters can be obtained from the first embodiment, which will not be repeated here.
  • optical system 10 in this embodiment satisfies the following relationship:
  • the longitudinal spherical aberration, field curvature and distortion of the optical system 10 are well controlled, wherein the meridional field curvature and sagittal field curvature are controlled within 0.05mm, and the maximum distortion is controlled within 2.5mm. %, so that the imaging quality of the optical system 10 is excellent.
  • the optical system 10 in the above-mentioned first to eighth embodiments can not only compress the system length, but also have the telephoto characteristic through the reasonable combination design of the refractive power, surface structure and parameter relationship of the seven lenses. It can match an image sensor with a larger photosensitive surface, so that the optical system 10 can achieve better processing of distant details on the basis of satisfying the miniaturized design, thereby achieving the imaging effect of compressing the shooting distance.
  • the camera module 20 may include an optical system 10 and an image sensor 210 , and the image sensor 210 is disposed on the image side of the optical system 10 .
  • the image sensor 210 may be a CCD sensor (Charge Coupled Device, charge coupled device) or a CMOS sensor (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor).
  • CCD sensor Charge Coupled Device, charge coupled device
  • CMOS sensor Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor
  • the camera module 20 will have a telephoto characteristic, so that it can better deal with the details of the distant view, and thus have excellent telephoto performance; at the same time, the length of the camera module 20 can also be obtained. Compression can realize miniaturization design, which can reduce the occupied space in the thickness direction of the device, so as to facilitate the ultra-thin design of the device.
  • the electronic device 30 includes a fixing member 310 , and the camera module 20 is mounted on the fixing member 310 , and the fixing member 310 may be a display screen, a circuit board, a middle frame, a back cover and other components.
  • Electronic devices 30 include, but are not limited to, smartphones, smart watches, smart glasses, e-book readers, in-vehicle camera equipment, surveillance equipment, drones, medical equipment (such as endoscopes), tablet computers, biometric devices (such as fingerprints) Recognition equipment or pupil recognition equipment, etc.), PDA (Personal Digital Assistant, personal digital assistant), drones, etc.
  • the electronic device 30 can assemble the camera module 20 in a smaller space, and at the same time, the camera module 20 can be used to obtain a good long-range shooting effect.
  • the "electronic device” used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via wired lines (eg, via a public switched telephone network (PSTN), digital subscriber line, DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), such as digital video broadcast broadcasting handheld, DVB-H) network digital television network, satellite network, AM-FM (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal) wireless interface to receive/transmit communication signals device of.
  • PSTN public switched telephone network
  • DSL digital subscriber line
  • DSL digital cable, direct cable connection, and/or another data connection/network
  • WLAN wireless local area networks
  • AM-FM amplitude modulation-frequency modulation, AM-FM
  • wireless communication terminals Electronic devices arranged to communicate over a wireless interface may be referred to as “wireless communication terminals", “wireless terminals” and/or “mobile terminals”.
  • mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistants (PDAs) with intranet access, web browsers, memo pads, calendars, and/or global positioning system (GPS) receivers; and conventional laptops and/or palmtops A receiver or other electronic device including a radiotelephone transceiver.
  • PCS personal communication system
  • PDAs Internet/ Personal digital assistants
  • GPS global positioning system
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.

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Abstract

一种光学系统(10)，包括：具有正屈折力的第一透镜(L1)，物侧面(S1)于近光轴(101)处为凸面，像侧面(S2)于近光轴(101)处为凹面；具有负屈折力的第二透镜(L2)，物侧面(S3)于近光轴(101)处为凸面，像侧面(S4)于近光轴(101)处为凹面；具有正屈折力的第三透镜(L3)，物侧面(S5)于近光轴(101)处为凸面；第四透镜(L4)；第五透镜(L5)，像侧面(S10)于近光轴(101)处为凸面；第六透镜(L6)，像侧面(S12)于近光轴(101)处为凹面；第七透镜(L7)，物侧面(S13)于近光轴(101)处为凸面，像侧面(S14)于近光轴(101)处为凹面，且两者均为非球面，以及其中至少一者存在反曲点；光学系统(10)还满足：1.004＜f/TTL＜1.1；f为光学系统(10)的有效焦距，TTL为光学系统(10)的光学总长。

Description

光学系统、摄像模组及电子设备 技术领域
本发明涉及摄影成像技术领域，特别是涉及一种光学系统、摄像模组及电子设备。
背景技术
近几年来，手机更新换代的周期越来越短，且拍摄功能也越来越强大，市场对单一种类的镜头的要求也愈加严格。而随着消费者对拍摄环境存在多样性的要求，因此适应不同拍摄环境的镜头的种类也越来越多。其中，长焦镜头因具有更长的焦距，从而可获得更浅的景深，于是能更好的处理远处景象细节进而达到压缩拍摄距离的成像效果。
但是，传统的长焦镜头往往存在尺寸过大以及对远景细节的处理能力不足的问题。
发明内容
根据本申请的各种实施例，提供一种光学系统、摄像模组及电子设备。
一种光学系统，沿光轴由物侧至像侧依次包括：
具有正屈折力的第一透镜，第一透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
具有负屈折力的第二透镜，第二透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
具有正屈折力的第三透镜，第三透镜的物侧面于近光轴处为凸面；
具有屈折力的第四透镜；
具有屈折力的第五透镜，第五透镜的像侧面于近光轴处为凸面；
具有屈折力的第六透镜，第六透镜的像侧面于近光轴处为凹面；
具有屈折力的第七透镜，第七透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面，所述第七透镜的物侧面和像侧面均为非球面，且物侧面和像侧面中的至少一者存在反曲点；
光学系统还满足关系：
1.004＜f/TTL＜1.1；及
f为光学系统的有效焦距，TTL为第一透镜的物侧面至光学系统的成像面于光轴上的距离。
一种摄像模组，包括图像传感器及上述任意一项的光学系统，图像传感器设于光学系统的像侧。
一种电子设备，包括固定件及上述的摄像模组，摄像模组设于固定件。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本申请第一实施例提供的光学系统的结构示意图；
图2包括第一实施例中光学系统的纵向球差图、像散图和畸变图；
图3为本申请第二实施例提供的光学系统的结构示意图；
图4包括第二实施例中光学系统的纵向球差图、像散图和畸变图；
图5为本申请第三实施例提供的光学系统的结构示意图；
图6包括第三实施例中光学系统的纵向球差图、像散图和畸变图；
图7为本申请第四实施例提供的光学系统的结构示意图；
图8包括第四实施例中光学系统的纵向球差图、像散图和畸变图；
图9为本申请第五实施例提供的光学系统的结构示意图；
图10包括第五实施例中光学系统的纵向球差图、像散图和畸变图；
图11为本申请第六实施例提供的光学系统的结构示意图；
图12包括第六实施例中光学系统的纵向球差图、像散图和畸变图；
图13为本申请第七实施例提供的光学系统的结构示意图；
图14包括第七实施例中光学系统的纵向球差图、像散图和畸变图；
图15为本申请第八实施例提供的光学系统的结构示意图；
图16包括第八实施例中光学系统的纵向球差图、像散图和畸变图；
图17为本申请一实施例提供的摄像模组的示意图；
图18为本申请一实施例提供的电子设备的结构示意图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“内”、“外”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
参考图1，本申请的实施例提供了一种具有七片式结构的光学系统10，光学系统10沿光轴101由物侧至像侧依次包括第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6及第七透镜L7。光学系统10中各透镜同轴设置，即各透镜的光轴均位于同一直线上，该直线可称为光学系统10的光轴101。光学系统10中的上述各光学元件可与镜筒装配以构成摄像镜头。
第一透镜L1包括物侧面S1和像侧面S2，第二透镜L2包括物侧面S3和像侧面S4，第三透镜L3包括物侧面S5和像侧面S6，第四透镜L4包括物侧面S7和像侧面S8，第五透镜L5包括物侧面S9及像侧面S10，第六透镜L6包括物侧面S11和像侧面S12，第七透镜L7包括物侧面S13和像侧面S14。另外，光学系统10还有一成像面S15，成像面S15位于第七透镜L7的像侧。一般地，光学系统10的成像面S15与图像传感器的感光表面重合，为方便理解，可将成像面S15视为图像传感器的感光表面。
在本申请的实施例中，第一透镜L1具有正屈折力，其物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；第二透镜L2具有负屈折力，其物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；第三透镜L3具有正屈折力，其物侧面S5于近光轴处为凸面；第四透镜L4具有正屈折力或负屈折力；第五透镜L5具有正屈折力或负屈折力，其像侧面S10于近光轴处为凸面；第六透镜L6具有正屈折力或负屈折力，其像侧面S12于近光轴处为凹面；第七透镜L7具有正屈折力或负屈折力，其物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面，且其物侧面S13和像侧面S14均为非球面，另外，其物侧面S13和像侧面S14中的至少一者存在反曲点。
上述光学系统10中，第一透镜L1的屈折力及面型配置有利于增大光学系统的进光亮，提高成像清晰度，另一方面也有利于增大光学系统的视场角，扩宽拍摄范围；第二透镜L2的前后两片透镜均具有正屈折力，通过使第二透镜L2拥有上述屈折力及面型设定，将有利于缩短系统总长，以及促使系统达到像差平衡；第三透镜L3的面型设计有利于加强正屈折力的强度，从而有利于校正物方透镜所产生的像差；第五透镜L5的设计同样可对物方透镜所产生的像散、畸变等像差进行校正；第六透镜L6的设计有利于缩短系统总长；第七透镜L7通过拥有上述面型设计，一方面有利于光学系统10获得更大的像面以匹配更高像素的图像传感器，另一方面也能够增大光学系统10的后焦，从而促使光学系统10在模组装配过程中拥有足够的安全距离以避免发生碰撞。另一方面，本申请实施例中的光学系统10通过以上的透镜数量、屈折力配置以及面型设计，一方面可有利于拥有长焦特性，另一方面也能够使透镜之间所产生的像差得到较好的平衡，从而抑制光学系统10的整体像差，使成像效果更为优良。
举例而言，当本申请的实施例在描述透镜的一个表面于近光轴处为凸面时，可理解为该透镜的该表面于光轴101附近的区域为凸面；当描述透镜的一个表面于近最大有效孔径处或于近圆周处为凹面 时，可理解为该表面在靠近最大有效孔径处的区域为凹面。举例而言，当该表面于近光轴处为凸面，且于近圆周处也为凸面时，该表面由中心(光轴101处)至边缘方向的形状可以为纯粹的凸面；或者是先由中心的凸面形状过渡到凹面形状，随后在靠近最大有效孔径处时变为凸面。本申请中对于凹凸特征的限定仅针对相应透镜表面的有效通光区域的面型。
在本申请的实施例中，光学系统10还满足以下关系条件：
1.004＜f/TTL＜1.1；f为光学系统10的有效焦距，TTL为第一透镜L1的物侧面S1至光学系统10的成像面S15于光轴上的距离。TTL也称为光学系统10的光学总长。
满足上述关系式条件时，也有利于光学系统10获得较长的焦距以获得长焦特性，同时还有利于压缩光学系统10的总长以使光学系统10具有相对紧凑的结构，进而实现光学系统10的小型化设计。另外，满足该关系时还有助于光学系统10更好的处理远处景象的细节，使所对焦的远处景物的细节更加突出，以达到良好的远摄成像效果，从而使用户获得更佳的拍摄体验。在一些实施例中，光学系统10所满足的该关系具体可以为1.01、1.015、1.02、1.025、1.045、1.065、1.078、1.083、1.086或1.09。当光学系统10进一步满足1.005≤f/TTL≤1.092的关系时，上述技术效果将更为显著。
此外，在一些实施例中，光学系统10还满足以下至少一个关系，且当满足任一关系式时均能带来相应的技术效果：
1.09＜2*Imgh/TTL＜1.2；Imgh为光学系统10的最大视场角所对应的像高的一半。Imgh也可理解为成像面S15上矩形有效成像区域的对角线长度。当装配图像传感器后，Imgh也可理解为图像传感器的矩形有效像素区域的中心至对角线边缘的距离，且上述有效成像区域的对角线方向平行于该矩形有效像素区域的对角线方向。通过进一步满足该关系式条件，一方面可有助于光学系统10进一步的实现长焦拍摄效果，另外还可使光学系统10在维持小型化的条件下具有较大的像面尺寸，从而有助于拥有大像面特性，进而能够更好地呈现远景的拍摄细节，以此提升光学系统10的远景拍摄性能。在一些实施例中，光学系统10所满足的该关系具体可以为1.095、1.1、1.11、1.124、1.136、1.149、1.158、1.162或1.165。
1＜f123/R12＜1.8；f123为第一透镜L1、第二透镜L2及第三透镜L3的组合焦距，R12为第一透镜L1的像侧面S2于光轴处的曲率半径。满足该关系时，第一透镜L1、第二透镜L2和第三透镜L3的组合有效焦距与第一透镜L1像侧面S2的曲率半径之间能够得到合理的配置，一方面可合理控制光学系统10中前三个透镜所构成的透镜组的正屈折力强度，并配合第一透镜L1的像侧面S2面型，使入射光线在进入光学系统10时即得到良好的调控，从而可有效减小光学系统10中各个相邻透镜之间的空气间隙，进而减小系统总长；另一方面还有助于控制第一透镜L1的像侧面S2面型，从而可平衡像方透镜产生的像差。当超过上述关系范围的上限时，第一透镜L1的像侧面S2的曲率半径过小，导致该面面型由于过于弯曲而与第二透镜L2之间的间隙过小，从而不仅会增加透镜的加工成型难度，同时还会导致透镜间的组装困难，另外也易导致屈折力过多集中于第一透镜L1，增加第一透镜L1的公差敏感度。当低于上述关系范围的下限时，第一透镜L1的像侧面S2的曲率半径过大，导致该面面型过于平缓，不利于校正后两个透镜产生的球差、彗差和像散。在一些实施例中，光学系统10所满足的该关系具体可以为1.1、1.13、1.18、1.25、1.34、1.43、1.47或1.56。
-2.2＜f567/f＜-0.9；f567为第五透镜L5、第六透镜L6及第七透镜L7的组合焦距。满足该关系时，第五透镜L5、第六透镜L6及第七透镜L7的组合焦距与光学系统10的总有效焦距的比值被控制在合理的范围内，从而有利于平衡物方透镜所产生的球差和色差，且能够通过合理调节第五透镜L5至第七透镜L7的组合屈折力强度，从而有效避免光学系统10的屈折力强度过度集中于后透镜组，从而可较好地提升系统像差矫正能力。同时，满足该关系时还可有效减小光学系统10的长度，同时突出光学系统10的长焦特性。当超过上述关系的上限时，第五透镜L5、第六透镜L6和第七透镜L7所构成的后方透镜组提供的负屈折力过大，使得光学系统10的屈折力过度集中于后透镜组，从而导致系统像差校正能力降低。当低于上述关系的下限时，第五透镜L5、第六透镜L6和第七透镜L7所构成的后透镜组提供的负屈折力不足，不足以平衡前透镜组的正屈折力，不利于长焦特性和大像面特性。在一些实施例中，光学系统10所满足的该关系具体可以为-2、-1.92、-1.85、-1.74、-1.53、-1.38、-1.2、-1.15、 -1或-0.95。
1＜f/f3＜1.6；f3为第三透镜L3的有效焦距。满足该关系时，光学系统10的总有效焦距与第三透镜L3的有效焦距之间能够得到合理配置，使得第三透镜L3的面型合适，不仅有助于减小光线在该透镜的入射角度，降低第三透镜L3的公差敏感度，另外还有利于光学系统10拥有长焦特性。当高于上述关系的上限时，第三透镜L3贡献的正屈折力过强，不利于与前后透镜组构成像差平衡，进而影响成像质量。当低于上述关系的下限时，第三透镜L3的正屈折力不足，前后透镜组产生的像差难以得到足够的校正，最后导致成像质量降低。在一些实施例中，光学系统10所满足的该关系具体可以为1.1、1.14、1.18、1.26、1.34、1.46、1.49、1.53或1.57。
2.5＜ct56/et56＜7；ct56为第五透镜L5的像侧面S10至第六透镜L6的物侧面S11于光轴上的距离，et56为第五透镜L5的像侧面S10最大有效孔径处至第六透镜L6的物侧面S11最大有效孔径处于光轴方向上的距离。满足上述关系时，可合理配置第五透镜L5与第六透镜L6之间在光轴上的间距与最大有效径处的间距，一方面有利于减小第五透镜L5与第六透镜L6之间的光线偏转角，进而能够降低这两个透镜的公差敏感度；另一方面也有利于第五透镜L5与第六透镜L6之间的组装；此外，还有助于缩减光学系统10的后端尺寸。当高于上述关系的上限时，第五透镜L5与第六透镜L6之间的边缘间隙过小，两个透镜边缘靠的太近，增加组装不良风险。在一些实施例中，光学系统10所满足的该关系具体可以为3、3.3、3.8、4.5、5.2、5.8、6、6.35或6.5。
0.4＜|sag61|/et6＜1.1；sag61为第六透镜L6的物侧面S11于最大有效孔径处的矢高，et6为第六透镜L6的物侧面S11最大有效孔径处至像侧面S12最大有效孔径处于光轴方向的厚度。应注意的是，透镜表面于最大有效孔径处的矢高为该表面与光轴101的交点至该最大有效孔径处于平行光轴101方向的距离。满足上述关系时，可合理配置第六透镜L6的物侧面S11于最大有效径处的矢高和第六透镜L6边缘厚度之间的比值，一方面有助于控制第六透镜L6的物侧面S11于边缘处的倾角，使该表面由中心至边缘的面型能够平滑地过渡，使得边缘光线也可以实现以较缓的角度过渡到后一透镜直至成像面S15；另一方面也可控制第六透镜L6的边缘厚度在合理的范围内，从而有利于控制整个透镜的厚薄比，使之不至于过大或者过小，从而降低透镜的成型组装难度。当高于上述关系的上限时，第六透镜L6的物侧面S11过于弯曲，不利于成型与组装。而当低于上述关系的下限时，则不利于边缘光线在经过第六透镜L6时平缓地过渡，从而导致成像面S15的边缘部分没有足够的照度，降低成像质量。在一些实施例中，光学系统10所满足的该关系具体可以为0.5、0.56、0.64、0.72、0.81、0.89、0.94、0.97或1。当光学系统10进一步满足0.455≤|sag61|/et6≤1.003的关系时，上述技术效果将更为显著。
-3＜sag71/et7＜-1；sag71为第七透镜L7的物侧面S13于最大有效孔径处的矢高，et7为第七透镜L7的物侧面S13最大有效孔径处至像侧面S14最大有效孔径处于光轴方向的厚度。应注意的是，透镜表面于最大有效孔径处的矢高为该表面与光轴101的交点至该最大有效孔径处于平行光轴101方向的距离。当sag71的数值为负时，则表明第七透镜L7物侧面S13的最大有效孔径位置相较该面与光轴101的交点位置而言更靠近物方。满足上述关系时，第七透镜L7的物侧面S13于最大有效径处的矢高与边缘厚度之间的比值被控制在合理的范围内，从而可有效控制七透镜在透镜边缘处的张角，使入射光线能够以较小的入射角射入第七透镜L7，并平缓地经过第七透镜L7以到达成像面S15，从而有利于使光学系统10实现大像面特性，进而显著地提升成像质量。当低于上述关系的下限时，易引起第七透镜L7的物侧面S13面型过陡，从而容易产生反曲，增大鬼像产生的风险；当高于上述关系的上限时，第七透镜L7的边缘厚度过大，容易使得第七透镜L7的厚薄比过大，从而导致透镜成型困难。在一些实施例中，光学系统10所满足的该关系具体可以为-2.4、-2.2、-2、-1.84、-1.67、-1.55、-1.32、-1.26或-1.2。当光学系统10进一步满足-2.52≤sag71/et7≤-1.16的关系时，上述效果将更为显著。
14＜f1/CT1＜23.5；f1为第一透镜L1的有效焦距，CT1为第一透镜L1于光轴上的厚度。满足该关系时，第一透镜L1的屈折力强度与中心厚度之间能够得到较好的配比，从而可在校正光学系统10的像差的同时提升透镜的成型加工的可行性。在一些实施例中，光学系统10所满足的该关系具体可以为14.5、15.3、15.8、16.7、18.2、19.5、20.7、21.6、22.5或23。
上述各关系式条件中涉及焦距的参数的参考波长为555nm，涉及折射率、阿贝数的参数的参考波长 均为587.6nm，即d光波长。另外，上述各焦距参数至少代表相应透镜于近光轴处的焦距。
以上各关系式条件及其所带来的技术效果针对的是具有上述透镜设计的七片式光学系统10。在无法确保前述光学系统10的透镜设计(透镜数量、屈折力配置、面型配置等)时，将难以确保光学系统10在满足这些关系条件时依然能够拥有相应的技术效果，甚至会出现摄像性能显著下降的可能。
光学系统10包括孔径光阑STO，孔径光阑STO用于控制光学系统10的进光量，并同时能够起到阻挡非有效光线的作用。孔径光阑STO可设于第一透镜L1的物侧，也可设于第一透镜L1至第七透镜L7中的其中两个相邻透镜之间。具体地，在一个实施例中，孔径光阑STO设于第三透镜L3与第四透镜L4之间。孔径光阑STO可以由夹持透镜的镜筒结构形成，也可以是单独装配至透镜和镜筒之间的垫圈。
在一些实施例中，第一透镜L1至第七透镜L7中至少一者的物侧面及/或像侧面为非球面，即第一透镜L1至第七透镜L7中的至少一者具有非球面面型。例如可以将第一透镜L1至第七透镜L7的物侧面及像侧面均设计为非球面。非球面的面型设置能够进一步帮助光学系统10消除像差，同时还有利于光学系统10的小型化设计，使光学系统10能够在保持小型化设计的前提下同时具备优良的光学效果。当然，在另一些实施例中，第一透镜L1至第七透镜L7中至少一者的物侧面及/或像侧面也可以为球面。应注意的是，透镜的实际面型并不限于附图中示出的球面或非球面的形状，附图仅为示例参考而非严格按比例绘制。另外还应注意的是，当某个透镜的物侧面或像侧面为非球面时，该面可以是整体呈现凸面或整体呈现凹面的结构。在一些实施例中，该面也可设计成存在反曲点的结构，此时该面由中心至边缘的面型将发生改变，例如该面于近光轴处呈凸面而于近圆周处呈凹面。
非球面的面型计算可参考非球面公式：
Figure PCTCN2021077404-appb-000001
Z为非球面上相应点到该面于光轴处的切平面的距离，r为非球面上相应点到光轴的距离，c为非球面于光轴处的曲率，k为圆锥系数，Ai为非球面面型公式中与第i阶高次项相对应的高次项系数。
另一方面，在一些实施例中，光学系统10中各透镜的材质均为塑料。当然，一些实施例中的各透镜的材质也可均为玻璃。塑料材质的透镜能够减少光学系统10的重量并降低生产成本，而玻璃材质的透镜能够耐受较高的温度且具有优良的光学效果。在一些实施例中，第一透镜L1至第七透镜L7中的至少一者的材质为塑料，且至少一者的材质为玻璃。光学系统10中透镜材质配置关系并不限于上述实施例，任一透镜的材质可以为塑料，也可以为玻璃，具体设计可根据实际需求而确定。在一些实施例中，塑料材质具体可以为聚碳酸酯。
在一些实施例中，光学系统10还包括红外截止滤光片110，红外截止滤光片110设置于第七透镜L7的像侧，并与光学系统10中的各透镜相对固定设置。红外截止滤光片110用于滤除红外光，防止红外光到达光学系统10的成像面S15，从而防止红外光干扰正常成像。红外截止滤光片110可与各透镜一同装配以作为光学系统10中的一部分。红外截止滤光片110可以在光学系统10与图像传感器装配时，一并安装至光学系统10与图像传感器之间。在一些实施例中，红外截止滤光片110也可设置在第一透镜L1的物侧。另外，在一些实施例中也可通过在第一透镜L1至第七透镜L7中的至少一个透镜上设置滤光镀层以实现滤除红外光的作用。
接下来以更为具体详细的实施例来对本申请的光学系统10进行说明：
第一实施例
参考图1和图2，在第一实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有负屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图2包括第一实施例中光学系统10的纵向球差图、像散图和畸变图，且以下各实施例中的像散图和畸变图的参考波长均为555nm。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凸面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凹面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凸面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凸面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
上述光学系统10中，第一透镜L1的屈折力及面型配置有利于增大光学系统的进光亮，提高成像清晰度，另一方面也有利于增大光学系统的视场角，扩宽拍摄范围；第二透镜L2的前后两片透镜均具有正屈折力，通过使第二透镜L2拥有上述屈折力及面型设定，将有利于缩短系统总长，以及促使系统达到像差平衡；第三透镜L3的面型设计有利于加强正屈折力的强度，从而有利于校正物方透镜所产生的像差；第五透镜L5的设计同样可对物方透镜所产生的像散、畸变等像差进行校正；第六透镜L6的设计有利于缩短系统总长；第七透镜L7通过拥有上述面型设计，一方面有利于光学系统10获得更大的像面以匹配更高像素的图像传感器，另一方面也能够增大光学系统10的后焦，从而促使光学系统10在模组装配过程中拥有足够的安全距离以避免发生碰撞。且上述由物侧至像侧分配的各透镜的屈折力及面型搭配合理，一方面可有利于拥有长焦特性，另一方面也能够使透镜之间所产生的像差得到较好的平衡，从而抑制光学系统10的整体像差，使成像效果更为优良。
该实施例中光学系统10的各透镜参数由以下的表1和表2给出。表2展现了表1中相应透镜表面的非球面系数，其中K为圆锥系数，Ai为非球面面型公式中与第i阶高次项相对应的系数。由光学系统10的物侧至像侧的各元件依次按照表1从上至下的顺序排列。表格中的光阑即为孔径光阑STO。面序号S1和S2所对应的表面分别表示第一透镜L1的物侧面S1和像侧面S2，即同一透镜中，面序号较小的表面为物侧面，面序号较大的表面为像侧面。Y半径为透镜相应表面于光轴处的曲率半径。透镜于“厚度”参数列中的第一个数值的绝对值为该透镜于光轴上的厚度，第二个数值的绝对值为该透镜的像侧面至后一光学元件的表面(如后一透镜的物侧面或光阑面)于光轴上的距离，光阑于“厚度”参数中的数值代表光阑面至后一光学元件的物侧面于光轴上的距离。在以下各实施例(第一实施例至第八实施例)的参数表格中，各透镜的折射率、阿贝数的参考波长均为587.6nm，焦距的参考波长为555nm，且Y半径、厚度、焦距(有效焦距)的数值单位均为毫米(mm)。另外，各实施例的关系式计算和透镜结构以参数表格(如表1、表2、表3、表4等)所提供的数据为准。
表1
Figure PCTCN2021077404-appb-000002
Figure PCTCN2021077404-appb-000003
由表1可知，光学系统10的有效焦距f为7.75mm，光圈数FNO为2.60，最大视场角FOV为43.57°，光学总长TTL为7.69mm。图像传感器的矩形有效像素区域具有对角线方向，当装配图像传感器时，FOV也可理解为光学系统10于平行该对角线方向的最大视场角。
另外可知，第一透镜L1、第二透镜L2、第四透镜L4及第五透镜L5的材质均为玻璃，第三透镜L3、第六透镜L6及第七透镜L7的材质均为塑料，且光学系统10中各透镜的物侧面和像侧面均为非球面。
表2
面序号 S1 S2 S3 S4 S5 S6 S7
K 5.565E-01 6.407E+00 -1.512E+00 -1.039E+00 -2.906E+00 9.900E+01 6.878E+01
A4 -3.270E-03 -4.421E-02 -9.650E-02 -7.823E-02 2.266E-02 2.043E-02 -9.300E-03
A6 -4.200E-03 4.707E-02 7.477E-02 1.063E-01 7.039E-02 -3.410E-03 -1.836E-02
A8 3.320E-03 -1.812E-02 -1.564E-02 -1.461E-01 -1.654E-01 -2.500E-02 -1.933E-02
A10 -1.570E-03 3.740E-03 -8.670E-03 1.609E-01 1.990E-01 3.395E-02 6.054E-02
A12 5.800E-04 -4.700E-04 6.560E-03 -1.048E-01 -1.269E-01 -1.999E-02 -6.690E-02
A14 -1.600E-04 4.000E-05 -1.910E-03 3.888E-02 4.574E-02 6.290E-03 4.213E-02
A16 3.000E-05 0.000E+00 3.000E-04 -8.190E-03 -9.410E-03 -1.090E-03 -1.578E-02
A18 0.000E+00 0.000E+00 -2.000E-05 9.200E-04 1.030E-03 1.000E-04 3.210E-03
A20 0.000E+00 0.000E+00 0.000E+00 -4.000E-05 -5.000E-05 0.000E+00 -2.700E-04
面序号 S8 S9 S10 S11 S12 S13 S14
K -9.900E+01 -2.288E+01 -2.967E+01 -7.561E+01 6.657E+00 1.100E+01 -2.244E+01
A4 -2.139E-02 3.560E-03 -2.665E-02 -7.859E-02 -8.283E-02 -1.902E-01 -1.042E-01
A6 -3.210E-03 1.652E-02 5.095E-02 3.356E-02 4.973E-02 8.672E-02 3.872E-02
A8 -4.544E-02 -7.081E-02 -1.157E-01 -5.517E-02 -4.987E-02 -3.540E-02 -9.900E-03
A10 1.018E-01 1.251E-01 1.600E-01 3.353E-02 3.061E-02 8.530E-03 -5.700E-04
A12 -1.045E-01 -1.142E-01 -1.228E-01 -7.100E-04 -1.121E-02 -1.960E-03 1.330E-03
A14 5.968E-02 6.234E-02 5.695E-02 -8.530E-03 2.470E-03 6.700E-04 -4.600E-04
A16 -1.911E-02 -2.049E-02 -1.578E-02 3.950E-03 -3.100E-04 -1.500E-04 8.000E-05
A18 3.190E-03 3.670E-03 2.380E-03 -7.200E-04 2.000E-05 1.000E-05 -1.000E-05
A20 -2.100E-04 -2.700E-04 -1.500E-04 5.000E-05 0.000E+00 0.000E+00 0.000E+00
在第一实施例中，光学系统10还满足以下各关系：
f/TTL＝1.009。满足上述关系时，有利于光学系统10获得较长的焦距以获得长焦特性，同时还有利于压缩光学系统10的总长以使光学系统10具有相对紧凑的结构，进而实现光学系统10的小型化设计。另外，满足该关系时还有助于光学系统10更好的处理远处景象的细节，使所对焦的远处景物的细节更加突出，以达到良好的远摄成像效果，从而使用户获得更佳的拍摄体验。
2*Imgh/TTL＝1.092；Imgh为光学系统10的最大视场角所对应的像高的一半。通过进一步满足该关系，一方面可有助于光学系统10进一步的实现长焦拍摄效果，另外还可使光学系统10在维持小型化的条件下具有较大的像面尺寸，从而有助于拥有大像面特性，进而能够更好地呈现远景的拍摄细节，以此提升光学系统10的远景拍摄性能。
f123/R12＝1.08。满足该关系时，一方面可合理控制光学系统10中前三个透镜所构成的透镜组的正屈折力强度，并配合第一透镜L1的像侧面S2面型，使入射光线在进入光学系统10时即得到良好的调控，从而可有效减小光学系统10中各个相邻透镜之间的空气间隙，进而减小系统总长；另一方面还有助于控制第一透镜L1的像侧面S2面型，从而可平衡像方透镜产生的像差。
f567/f＝-0.96。满足该关系时，有利于平衡物方透镜所产生的球差和色差，且能够有效避免光学系统10的屈折力强度过度集中于后透镜组，从而可较好地提升系统像差矫正能力。同时，满足该关系时还可有效减小光学系统10的长度，同时突出光学系统10的长焦特性。
f/f3＝1.28。满足该关系时，光学系统10的总有效焦距与第三透镜L3的有效焦距之间能够得到合理配置，使得第三透镜L3的面型合适，不仅有助于减小光线在该透镜的入射角度，降低第三透镜L3的公差敏感度，另外还有利于光学系统10拥有长焦特性。
ct56/et56＝4.18。满足上述关系时，可合理配置第五透镜L5与第六透镜L6之间在光轴上的间距与最大有效径处的间距，一方面有利于减小第五透镜L5与第六透镜L6之间的光线偏转角，进而能够降低这两个透镜的公差敏感度；另一方面也有利于第五透镜L5与第六透镜L6之间的组装；此外，还有助于缩减光学系统10的后端尺寸。
|sag61|/et6＝0.456。满足上述关系时，一方面有助于控制第六透镜L6的物侧面S11于边缘处的倾角，使该表面由中心至边缘的面型能够平滑地过渡，使得边缘光线也可以实现以较缓的角度过渡到后一透镜直至成像面S15；另一方面也可控制第六透镜L6的边缘厚度在合理的范围内，从而有利于控制整个透镜的厚薄比，使之不至于过大或者过小，从而降低透镜的成型组装难度。
sag71/et7＝-1.82。满足上述关系时，可有效控制七透镜在透镜边缘处的张角，使入射光线能够以较小的入射角射入第七透镜L7，并平缓地经过第七透镜L7以到达成像面S15，从而有利于使光学系统10实现大像面特性，进而显著地提升成像质量。
f1/CT1＝16.08。满足该关系时，第一透镜L1的屈折力强度与中心厚度之间能够得到较好的配比，从而可在校正光学系统10的像差的同时提升透镜的成型加工的可行性。
另外，图2包括光学系统10的纵向球面像差图(Longitudinal Spherical Aberration)，其表示不同波长的光线经由镜头后的汇聚焦点偏离。纵向球面像差图的纵坐标表示归一化的由光瞳中心至光瞳边缘的光瞳坐标(Normalized Pupil Coordinator)，横坐标表示成像面到光线与光轴交点的距离(单位为mm)。由纵向球面像差图可知，第一实施例中的各波长光线的汇聚焦点偏离程度趋于一致，成像画面中的弥散斑或色晕得到有效抑制。图2还包括光学系统10的场曲图(Astigmatic Field Curves)，其中S曲线代表555nm下的弧矢场曲，T曲线代表555nm下的子午场曲。由图中可知，光学系统的场曲较小，各视场的场曲和像散均得到了良好的校正，视场中心和边缘均拥有清晰的成像。图2还包括光学系统10的畸变图(Distortion)，由图中可知，由主光束引起的图像变形较小，最大畸变被控制在2.5％以内，因此可判断光学系统10的成像质量优良。
第二实施例
参考图3和图4，在第二实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图4包括第二实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凸面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凸面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凸面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第二实施例中光学系统10的各透镜参数由表3和表4给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表3
Figure PCTCN2021077404-appb-000004
表4
面序号 S1 S2 S3 S4 S5 S6 S7
K 3.472E-01 4.415E+00 -9.897E-01 -8.015E-01 -1.812E+00 -9.900E+01 9.900E+01
A4 -4.140E-03 -4.884E-02 -9.174E-02 -7.528E-02 6.100E-03 1.809E-02 -3.105E-02
A6 -3.710E-03 4.772E-02 7.609E-02 8.432E-02 5.718E-02 -1.524E-02 5.680E-03
A8 3.320E-03 -1.821E-02 -2.236E-02 -9.632E-02 -1.290E-01 2.884E-02 -5.546E-02
A10 -1.960E-03 3.760E-03 -2.820E-03 1.047E-01 1.755E-01 -4.880E-02 1.386E-01
A12 8.000E-04 -4.700E-04 4.400E-03 -6.541E-02 -1.246E-01 4.990E-02 -1.771E-01
A14 -2.300E-04 4.000E-05 -1.540E-03 2.250E-02 5.090E-02 -2.806E-02 1.337E-01
A16 4.000E-05 0.000E+00 2.700E-04 -4.310E-03 -1.221E-02 8.540E-03 -5.886E-02
A18 0.000E+00 0.000E+00 -2.000E-05 4.300E-04 1.600E-03 -1.320E-03 1.373E-02
A20 0.000E+00 0.000E+00 0.000E+00 -2.000E-05 -9.000E-05 8.000E-05 -1.300E-03
面序号 S8 S9 S10 S11 S12 S13 S14
K -9.900E+01 1.694E+01 -3.402E+01 4.728E+01 5.653E+00 1.100E+01 -1.840E+01
A4 -4.560E-02 8.790E-03 1.110E-02 -5.535E-02 -9.082E-02 -1.804E-01 -8.680E-02
A6 1.131E-02 -2.250E-03 3.150E-03 4.588E-02 9.189E-02 8.337E-02 3.182E-02
A8 -4.579E-02 -5.998E-02 -7.625E-02 -9.462E-02 -1.039E-01 -3.707E-02 -9.160E-03
A10 9.186E-02 1.101E-01 1.027E-01 6.435E-02 6.885E-02 1.334E-02 9.900E-04
A12 -9.170E-02 -9.080E-02 -5.634E-02 -1.307E-02 -2.763E-02 -4.870E-03 3.200E-04
A14 5.198E-02 4.392E-02 1.328E-02 -4.770E-03 6.890E-03 1.490E-03 -1.600E-04
A16 -1.661E-02 -1.278E-02 2.500E-04 2.920E-03 -1.040E-03 -2.700E-04 3.000E-05
A18 2.760E-03 2.030E-03 -7.200E-04 -5.400E-04 9.000E-05 2.000E-05 0.000E+00
A20 -1.900E-04 -1.300E-04 1.000E-04 3.000E-05 0.000E+00 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.014 ct56/et56 5.52
2*Imgh/TTL 1.092 |sag61|/et6 0.455
f123/R12 1.19 sag71/et7 -1.37
f567/f -1.16 f1/CT1 15.12
f/f3 1.32    
由图4中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.05mm以内，最大畸变被控制在2.5％以内，从而该实施例的光学系统10拥有优良的成像品质。
第三实施例
参考图5和图6，在第三实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有正屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图6包括第三实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凹面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凹面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凹面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第三实施例中光学系统10的各透镜参数由表5和表6给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表5
Figure PCTCN2021077404-appb-000005
表6
面序号 S1 S2 S3 S4 S5 S6 S7
K 2.926E-01 3.604E+00 -1.007E+00 -7.026E-01 -1.372E+00 8.365E+01 -9.900E+01
A4 -4.860E-03 -6.343E-02 -9.836E-02 -5.648E-02 2.011E-02 6.500E-03 -4.422E-02
A6 -3.240E-03 5.533E-02 7.317E-02 5.446E-02 3.162E-02 -1.178E-02 2.632E-02
A8 3.270E-03 -2.012E-02 -1.006E-02 -7.243E-02 -1.153E-01 3.005E-02 -1.020E-01
A10 -2.420E-03 4.020E-03 -1.451E-02 9.286E-02 1.747E-01 -4.689E-02 2.328E-01
A12 1.230E-03 -4.900E-04 1.023E-02 -6.089E-02 -1.255E-01 4.503E-02 -3.004E-01
A14 -4.000E-04 4.000E-05 -3.210E-03 2.111E-02 5.096E-02 -2.397E-02 2.313E-01
A16 8.000E-05 0.000E+00 5.500E-04 -4.020E-03 -1.213E-02 6.900E-03 -1.042E-01
A18 -1.000E-05 0.000E+00 -5.000E-05 4.000E-04 1.580E-03 -1.010E-03 2.496E-02
A20 0.000E+00 0.000E+00 0.000E+00 -2.000E-05 -9.000E-05 6.000E-05 -2.440E-03
面序号 S8 S9 S10 S11 S12 S13 S14
K 9.900E+01 -1.001E+01 -2.331E+01 6.571E+00 5.004E+00 1.088E+01 -1.897E+01
A4 -4.841E-02 9.100E-04 7.800E-04 -3.778E-02 -5.243E-02 -1.821E-01 -1.039E-01
A6 1.759E-02 -4.920E-03 -1.935E-02 -1.622E-02 3.468E-02 7.978E-02 4.194E-02
A8 -4.246E-02 -1.811E-02 -2.930E-03 -2.670E-02 -6.050E-02 -2.693E-02 -1.318E-02
A10 7.769E-02 5.853E-02 2.865E-02 2.776E-02 4.842E-02 2.770E-03 1.470E-03
A12 -7.579E-02 -6.105E-02 -1.769E-02 -4.800E-03 -2.171E-02 -2.000E-05 5.100E-04
A14 4.235E-02 3.417E-02 1.420E-03 -4.390E-03 5.850E-03 4.300E-04 -2.500E-04
A16 -1.331E-02 -1.090E-02 2.390E-03 2.380E-03 -9.400E-04 -1.700E-04 5.000E-05
A18 2.170E-03 1.840E-03 -9.100E-04 -4.500E-04 8.000E-05 2.000E-05 -1.000E-05
A20 -1.400E-04 -1.300E-04 1.000E-04 3.000E-05 0.000E+00 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.020 ct56/et56 5.62
2*Imgh/TTL 1.094 |sag61|/et6 0.516
f123/R12 1.53 sag71/et7 -1.98
f567/f -1.02 f1/CT1 14.33
f/f3 1.09    
由图6中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.025mm以内，最大畸变被控制在2.5％左右，从而光学系统10的成像品质优良。
第四实施例
参考图7和图8，在第四实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有正屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图8包括第四实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凹面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凹面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凸面，像侧面S8于近光轴处为凹面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凹面。
第五透镜L5的物侧面S9于近光轴处为凸面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凸面，像侧面S10于近圆周处为凸面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第四实施例中光学系统10的各透镜参数由表7和表8给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表7
Figure PCTCN2021077404-appb-000006
Figure PCTCN2021077404-appb-000007
表8
面序号 S1 S2 S3 S4 S5 S6 S7
K 1.938E-01 2.829E+00 -8.316E-01 -7.949E-01 -2.243E-01 1.952E+01 2.572E+01
A4 -5.600E-04 -3.283E-02 -9.504E-02 -9.467E-02 6.240E-03 1.883E-02 -5.147E-02
A6 -5.140E-03 5.717E-02 9.705E-02 1.132E-01 7.358E-02 5.760E-03 3.150E-02
A8 6.630E-03 -3.230E-02 -5.489E-02 -1.132E-01 -1.158E-01 2.310E-03 -6.315E-02
A10 -5.280E-03 9.090E-03 1.464E-02 8.601E-02 1.285E-01 -1.830E-02 1.257E-01
A12 2.560E-03 -1.490E-03 1.720E-03 -3.906E-02 -8.500E-02 2.290E-02 -1.672E-01
A14 -8.700E-04 1.500E-04 -2.280E-03 1.025E-02 3.434E-02 -1.378E-02 1.376E-01
A16 1.900E-04 -1.000E-05 6.100E-04 -1.540E-03 -8.250E-03 4.310E-03 -6.573E-02
A18 -2.000E-05 0.000E+00 -7.000E-05 1.200E-04 1.060E-03 -6.800E-04 1.636E-02
A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 -6.000E-05 4.000E-05 -1.630E-03
面序号 S8 S9 S10 S11 S12 S13 S14
K 1.985E+01 9.900E+01 8.486E+01 -1.426E+01 4.512E+00 1.765E+01 -2.373E+01
A4 -6.576E-02 -4.053E-02 -8.462E-02 -1.533E-01 -1.185E-01 -2.195E-01 -1.299E-01
A6 2.989E-02 3.414E-02 8.445E-02 1.102E-01 9.021E-02 1.227E-01 6.688E-02
A8 -3.121E-02 -4.728E-02 -9.209E-02 -9.608E-02 -7.904E-02 -5.905E-02 -2.889E-02
A10 3.505E-02 5.668E-02 8.074E-02 4.832E-02 4.948E-02 2.240E-02 8.790E-03
A12 -2.761E-02 -4.421E-02 -4.402E-02 -5.690E-03 -2.062E-02 -7.010E-03 -1.800E-03
A14 1.496E-02 2.202E-02 1.297E-02 -6.970E-03 5.550E-03 1.690E-03 2.200E-04
A16 -4.900E-03 -6.470E-03 -1.210E-03 3.710E-03 -9.100E-04 -2.600E-04 -1.000E-05
A18 8.400E-04 1.000E-03 -2.400E-04 -7.200E-04 8.000E-05 2.000E-05 0.000E+00
A20 -6.000E-05 -6.000E-05 5.000E-05 5.000E-05 0.000E+00 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.032 ct56/et56 4.83
2*Imgh/TTL 1.111 |sag61|/et6 0.708
f123/R12 1.42 sag71/et7 -2.52
f567/f -2.08 f1/CT1 15.50
f/f3 1.29    
由图8中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.025mm以内，最大畸变被控制在2.5％左右，从而光学系统10的成像品质优良。
第五实施例
参考图9和图10，在第五实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈 折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图10包括第五实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凹面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凹面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凹面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凸面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第五实施例中光学系统10的各透镜参数由表9和表10给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表9
Figure PCTCN2021077404-appb-000008
表10
面序号 S1 S2 S3 S4 S5 S6 S7
K 2.405E-01 3.515E+00 -9.017E-01 -9.586E-01 -1.058E+00 -9.338E+01 -9.900E+01
A4 1.100E-04 -8.960E-03 -7.232E-02 -9.346E-02 3.400E-03 3.145E-02 -2.300E-02
A6 -3.800E-03 1.860E-02 6.002E-02 9.605E-02 5.832E-02 -1.231E-02 1.980E-03
A8 1.760E-03 -8.470E-03 -3.289E-02 -8.242E-02 -7.388E-02 1.538E-02 -4.413E-02
A10 -4.800E-04 1.810E-03 1.200E-02 5.963E-02 7.983E-02 -2.535E-02 1.177E-01
A12 -9.000E-05 -2.200E-04 -1.320E-03 -2.692E-02 -5.459E-02 2.288E-02 -1.576E-01
A14 3.000E-05 2.000E-05 -6.400E-04 7.050E-03 2.304E-02 -1.149E-02 1.252E-01
A16 1.000E-05 0.000E+00 2.500E-04 -1.050E-03 -5.740E-03 3.210E-03 -5.716E-02
A18 0.000E+00 0.000E+00 -3.000E-05 8.000E-05 7.600E-04 -4.600E-04 1.354E-02
A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 -4.000E-05 3.000E-05 -1.280E-03
面序号 S8 S9 S10 S11 S12 S13 S14
K 6.745E+01 5.482E+01 -9.403E+00 4.950E+01 5.087E+00 9.691E+00 -2.350E+01
A4 -3.781E-02 1.078E-02 4.916E-02 5.527E-02 -1.356E-02 -1.707E-01 -9.181E-02
A6 1.840E-03 -3.668E-02 -9.321E-02 -1.406E-01 -2.738E-02 8.370E-02 3.209E-02
A8 -1.476E-02 3.251E-02 7.767E-02 1.073E-01 -1.460E-03 -4.452E-02 -9.640E-03
A10 5.069E-02 -2.154E-02 -5.223E-02 -8.052E-02 1.129E-02 1.984E-02 1.210E-03
A12 -6.300E-02 1.052E-02 3.156E-02 5.363E-02 -6.220E-03 -7.510E-03 2.900E-04
A14 4.495E-02 -2.300E-03 -1.508E-02 -2.467E-02 1.660E-03 2.020E-03 -1.700E-04
A16 -1.786E-02 -3.000E-05 4.950E-03 6.820E-03 -2.300E-04 -3.200E-04 4.000E-05
A18 3.580E-03 8.000E-05 -9.300E-04 -1.010E-03 2.000E-05 2.000E-05 0.000E+00
A20 -2.800E-04 -1.000E-05 7.000E-05 6.000E-05 0.000E+00 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.024 ct56/et56 2.97
2*Imgh/TTL 1.099 |sag61|/et6 0.745
f123/R12 1.26 sag71/et7 -2.18
f567/f -1.77 f1/CT1 16.74
f/f3 1.45    
由图10中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.025mm以内，最大畸变被控制在2.5％左右，从而光学系统10的成像品质优良。
第六实施例
参考图11和图12，在第六实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图12包括第六实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凸面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凸面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凸面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆 周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第六实施例中光学系统10的各透镜参数由表11和表12给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表11
Figure PCTCN2021077404-appb-000009
表12
面序号 S1 S2 S3 S4 S5 S6 S7
K 4.306E-01 4.914E+00 -1.611E+00 -9.591E-01 -2.682E+00 -9.732E+01 4.513E+01
A4 -3.600E-03 -2.906E-02 -9.747E-02 -8.793E-02 2.031E-02 7.960E-03 -2.684E-02
A6 -6.030E-03 3.817E-02 8.616E-02 9.851E-02 4.302E-02 -2.990E-03 1.264E-02
A8 6.030E-03 -1.505E-02 -3.310E-02 -7.945E-02 -6.570E-02 1.500E-04 -4.210E-02
A10 -3.260E-03 3.050E-03 2.470E-03 5.195E-02 5.967E-02 -1.400E-03 7.615E-02
A12 1.120E-03 -3.700E-04 2.830E-03 -2.241E-02 -2.858E-02 2.570E-03 -7.699E-02
A14 -2.600E-04 3.000E-05 -1.230E-03 5.800E-03 7.260E-03 -1.490E-03 4.590E-02
A16 4.000E-05 0.000E+00 2.400E-04 -8.700E-04 -8.900E-04 4.000E-04 -1.594E-02
A18 0.000E+00 0.000E+00 -2.000E-05 7.000E-05 3.000E-05 -5.000E-05 2.940E-03
A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 -2.200E-04
面序号 S8 S9 S10 S11 S12 S13 S14
K 9.900E+01 -9.208E+00 -2.790E+01 -9.900E+01 5.907E+00 9.294E+00 -2.238E+01
A4 -4.128E-02 3.000E-04 -1.839E-02 -4.589E-02 -9.206E-02 -1.369E-01 -5.290E-02
A6 1.249E-02 9.810E-03 3.325E-02 2.461E-02 7.565E-02 6.143E-02 8.480E-03
A8 -3.297E-02 -7.823E-02 -1.002E-01 -9.797E-02 -1.021E-01 -3.437E-02 1.740E-03
A10 5.311E-02 1.330E-01 1.313E-01 1.005E-01 7.955E-02 1.742E-02 -2.400E-03
A12 -4.618E-02 -1.048E-01 -8.236E-02 -5.797E-02 -3.881E-02 -7.200E-03 1.020E-03
A14 2.254E-02 4.859E-02 2.934E-02 2.060E-02 1.201E-02 1.940E-03 -2.500E-04
A16 -6.080E-03 -1.396E-02 -6.190E-03 -4.470E-03 -2.250E-03 -2.900E-04 4.000E-05
A18 8.400E-04 2.280E-03 7.200E-04 5.400E-04 2.300E-04 2.000E-05 0.000E+00
A20 -5.000E-05 -1.600E-04 -4.000E-05 -3.000E-05 -1.000E-05 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.015 ct56/et56 5.14
2*Imgh/TTL 1.105 |sag61|/et6 0.752
f123/R12 1.07 sag71/et7 -1.16
f567/f -1.12 f1/CT1 23.03
f/f3 1.36    
由图12中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.025mm以内，最大畸变被控制在2.5％左右，从而光学系统10的成像品质优良。
第七实施例
参考图13和图14，在第七实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图14包括第七实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凸面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凸面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凸面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凸面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凹面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第七实施例中光学系统10的各透镜参数由表13和表14给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表13
Figure PCTCN2021077404-appb-000010
Figure PCTCN2021077404-appb-000011
表14
面序号 S1 S2 S3 S4 S5 S6 S7
K 1.997E-01 3.463E+00 -1.499E+00 -9.003E-01 -4.002E+00 5.801E+01 3.436E+01
A4 -1.900E-04 -3.066E-02 -8.195E-02 -7.565E-02 1.365E-02 -9.600E-04 -3.398E-02
A6 -4.230E-03 2.421E-02 4.031E-02 2.860E-02 5.830E-03 6.500E-03 1.800E-02
A8 3.420E-03 -6.010E-03 4.570E-03 6.160E-03 -1.217E-02 -8.500E-03 -1.457E-02
A10 -1.860E-03 4.500E-04 -1.173E-02 7.400E-04 2.776E-02 4.670E-03 5.160E-03
A12 6.300E-04 5.000E-05 5.810E-03 -3.730E-03 -2.030E-02 -3.800E-04 7.210E-03
A14 -1.500E-04 -1.000E-05 -1.660E-03 1.390E-03 7.250E-03 -5.600E-04 -1.081E-02
A16 3.000E-05 0.000E+00 2.900E-04 -2.100E-04 -1.300E-03 2.200E-04 6.010E-03
A18 0.000E+00 0.000E+00 -3.000E-05 1.000E-05 9.000E-05 -3.000E-05 -1.570E-03
A20 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.600E-04
面序号 S8 S9 S10 S11 S12 S13 S14
K -9.900E+01 1.553E+01 -9.708E+00 -7.459E+00 5.582E+00 8.364E+00 -1.993E+01
A4 -4.643E-02 -1.933E-02 -2.061E-02 -8.126E-02 -1.024E-01 -1.319E-01 -5.958E-02
A6 1.672E-02 1.147E-02 2.045E-02 9.139E-02 9.686E-02 5.522E-02 1.436E-02
A8 -1.357E-02 -3.729E-02 -6.502E-02 -1.722E-01 -1.160E-01 -2.328E-02 -1.530E-03
A10 4.950E-03 6.582E-02 9.402E-02 1.636E-01 8.471E-02 8.830E-03 -9.800E-04
A12 5.920E-03 -6.712E-02 -8.085E-02 -9.847E-02 -4.007E-02 -3.110E-03 5.700E-04
A14 -8.720E-03 4.409E-02 4.560E-02 3.724E-02 1.227E-02 7.800E-04 -1.500E-04
A16 4.510E-03 -1.719E-02 -1.578E-02 -8.290E-03 -2.310E-03 -1.100E-04 2.000E-05
A18 -1.040E-03 3.480E-03 2.980E-03 9.800E-04 2.400E-04 1.000E-05 0.000E+00
A20 9.000E-05 -2.800E-04 -2.300E-04 -5.000E-05 -1.000E-05 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.005 ct56/et56 3.45
2*Imgh/TTL 1.097 |sag61|/et6 0.947
f123/R12 1.14 sag71/et7 -1.21
f567/f -1.04 f1/CT1 18.68
f/f3 1.38    
由图14中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.025mm以内，最大畸变被控制在5％左右，从而光学系统10的成像品质优良。
第八实施例
参考图15和图16，在第八实施例中，光学系统10沿光轴101由物侧至像侧依次包括具有正屈折力的第一透镜L1、具有负屈折力的第二透镜L2、具有正屈折力的第三透镜L3、孔径光阑STO、具有负屈折力的第四透镜L4、具有正屈折力的第五透镜L5、具有负屈折力的第六透镜L6及具有负屈折力的第七透镜L7。图16包括第八实施例中光学系统10的纵向球差图、像散图和畸变图。
第一透镜L1的物侧面S1于近光轴处为凸面，像侧面S2于近光轴处为凹面；物侧面S1于近圆周处为凸面，像侧面S2于近圆周处为凹面。
第二透镜L2的物侧面S3于近光轴处为凸面，像侧面S4于近光轴处为凹面；物侧面S3于近圆周处为凸面，像侧面S4于近圆周处为凹面。
第三透镜L3的物侧面S5于近光轴处为凸面，像侧面S6于近光轴处为凸面；物侧面S5于近圆周处为凸面，像侧面S6于近圆周处为凹面。
第四透镜L4的物侧面S7于近光轴处为凹面，像侧面S8于近光轴处为凹面；物侧面S7于近圆周处为凹面，像侧面S8于近圆周处为凸面。
第五透镜L5的物侧面S9于近光轴处为凹面，像侧面S10于近光轴处为凸面；物侧面S9于近圆周处为凹面，像侧面S10于近圆周处为凹面。
第六透镜L6的物侧面S11于近光轴处为凹面，像侧面S12于近光轴处为凹面；物侧面S11于近圆周处为凹面，像侧面S12于近圆周处为凸面。
第七透镜L7的物侧面S13于近光轴处为凸面，像侧面S14于近光轴处为凹面；物侧面S13于近圆周处为凸面，像侧面S14于近圆周处为凹面。
另外，第八实施例中光学系统10的各透镜参数由表15和表16给出，其中各元件名称和参数的定义可由第一实施例中得出，此处不加以赘述。
表15
Figure PCTCN2021077404-appb-000012
Figure PCTCN2021077404-appb-000013
表16
面序号 S1 S2 S3 S4 S5 S6 S7
K -9.081E-02 8.599E-01 -1.546E+00 -7.254E-01 -9.007E-01 -9.383E+01 9.900E+01
A4 8.940E-03 -1.268E-01 -3.037E-01 -2.964E-01 -3.924E-02 6.652E-02 3.349E-02
A6 -1.975E-02 1.889E-01 4.193E-01 5.446E-01 2.750E-01 -2.562E-02 -8.667E-02
A8 3.777E-02 -1.119E-01 -3.049E-01 -6.676E-01 -5.069E-01 -5.529E-02 3.630E-03
A10 -4.051E-02 3.392E-02 1.258E-01 5.577E-01 5.548E-01 1.230E-01 1.344E-01
A12 2.727E-02 -5.990E-03 -2.313E-02 -2.854E-01 -3.471E-01 -1.184E-01 -1.999E-01
A14 -1.179E-02 6.500E-04 -1.880E-03 8.725E-02 1.280E-01 6.394E-02 1.442E-01
A16 3.000E-03 -4.000E-05 1.680E-03 -1.560E-02 -2.786E-02 -1.951E-02 -5.609E-02
A18 -4.000E-04 0.000E+00 -2.900E-04 1.510E-03 3.330E-03 3.110E-03 1.118E-02
A20 2.000E-05 0.000E+00 2.000E-05 -6.000E-05 -1.700E-04 -2.000E-04 -8.900E-04
面序号 S8 S9 S10 S11 S12 S13 S14
K 9.900E+01 5.594E+01 2.397E+00 -6.282E+00 2.571E+00 5.893E+00 -8.333E+01
A4 -1.952E-02 5.990E-03 7.390E-03 -4.139E-01 -4.308E-01 -1.084E-01 -5.577E-02
A6 -5.635E-02 -6.929E-02 3.015E-02 5.414E-01 5.907E-01 4.052E-02 1.539E-02
A8 -3.057E-02 -2.321E-02 -2.295E-01 -5.105E-01 -6.439E-01 -1.315E-02 -4.780E-03
A10 1.563E-01 -1.007E-02 3.238E-01 1.793E-01 5.017E-01 3.950E-03 1.260E-03
A12 -1.941E-01 6.218E-02 -3.343E-01 1.062E-01 -2.637E-01 -8.700E-04 -2.100E-04
A14 1.217E-01 -1.050E-01 2.402E-01 -1.331E-01 9.056E-02 1.300E-04 1.000E-05
A16 -4.075E-02 9.651E-02 -9.915E-02 5.477E-02 -1.947E-02 -1.000E-05 0.000E+00
A18 6.910E-03 -4.133E-02 2.084E-02 -1.044E-02 2.380E-03 0.000E+00 0.000E+00
A20 -4.700E-04 6.490E-03 -1.740E-03 7.800E-04 -1.300E-04 0.000E+00 0.000E+00
该实施例中的光学系统10满足以下关系：
f/TTL 1.092 ct56/et56 6.60
2*Imgh/TTL 1.167 |sag61|/et6 1.003
f123/R12 1.59 sag71/et7 -1.57
f567/f -0.93 f1/CT1 16.43
f/f3 1.59    
由图16中的像差图可知，光学系统10的纵向球差、场曲和畸变均得到良好的控制，其中子午场曲和弧矢场曲被控制在0.05mm以内，最大畸变被控制在2.5％以内，从而光学系统10的成像品质优良。
上述第一至第八实施例中的光学系统10，通过七个透镜的屈折力、面型结构以及参数关系等特征的合理组合设计，不仅能够压缩系统长度，同时还拥有长焦特性，另外还能匹配具有更大尺寸的感光面的图像传感器，从而使得光学系统10能够在满足小型化设计的基础上，还能对远景细节实现更优的处理，进而达到压缩拍摄距离的成像效果。
参考图17，本申请的一些实施例还提供了一种摄像模组20，摄像模组20可包括光学系统10及图像传感器210，图像传感器210设置于光学系统10的像侧。图像传感器210可以为CCD传感器(Charge Coupled Device，电荷耦合器件)或CMOS传感器(Complementary Metal Oxide Semiconductor，互补金属氧化物半导体)。一般地，在装配时，光学系统10的成像面S15与图像传感器210的感光表面重叠。
通过采用上述任一实施例中的光学系统10，摄像模组20将拥有长焦特性，从而能够更好地处理远景细节，进而拥有优良的远摄性能；同时摄像模组20的长度还能够得到压缩以实现小型化设计，进而可减小在设备厚度方向的占据空间，以利于设备的超薄化设计。
参考图18，本申请的一些实施例还提供了一种电子设备30。电子设备30包括固定件310，摄像模组20安装于固定件310，固定件310可以为显示屏、电路板、中框、后盖等部件。电子设备30包括但不限于智能手机、智能手表、智能眼镜、电子书阅读器、车载摄像设备、监控设备、无人机、医疗设备(如内窥镜)、平板电脑、生物识别设备(如指纹识别设备或瞳孔识别设备等)、PDA(Personal Digital Assistant，个人数字助理)、无人机等。通过采用上述摄像模组20，电子设备30能够以更小的空间装配摄像模组20，同时还能通过摄像模组20以获得良好的远景拍摄效果。
本发明实施例中所使用到的“电子设备”可包括，但不限于被设置成经由有线线路连接(如经由公共交换电话网络(public switched telephone network，PSTN)、数字用户线路(digital subscriber line，DSL)、数字电缆、直接电缆连接，以及/或另一数据连接/网络)和/或经由(例如，针对蜂窝网络、无线局域网(wireless local area network，WLAN)、诸如手持数字视频广播(digital video broadcasting handheld，DVB-H)网络的数字电视网络、卫星网络、调幅-调频(amplitude modulation-frequency modulation，AM-FM)广播发送器，以及/或另一通信终端的)无线接口接收/发送通信信号的设备。被设置成通过无线接口通信的电子设备可以被称为“无线通信终端”、“无线终端”以及/或“移动终端”。移动终端的示例包括，但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(personal communication system，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(global positioning system，GPS)接收器的个人数字助理(personal digital assistant，PDA)；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子设备。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“厚度”、“上”、“前”、“后”、“轴向”、“径向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (21)

  1. 一种光学系统，沿光轴由物侧至像侧依次包括：
    具有正屈折力的第一透镜，所述第一透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
    具有负屈折力的第二透镜，所述第二透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面；
    具有正屈折力的第三透镜，所述第三透镜的物侧面于近光轴处为凸面；
    具有屈折力的第四透镜；
    具有屈折力的第五透镜，所述第五透镜的像侧面于近光轴处为凸面；
    具有屈折力的第六透镜，所述第六透镜的像侧面于近光轴处为凹面；
    具有屈折力的第七透镜，所述第七透镜的物侧面于近光轴处为凸面，像侧面于近光轴处为凹面，所述第七透镜的物侧面和像侧面均为非球面，且物侧面和像侧面中的至少一者存在反曲点；
    所述光学系统还满足关系：
    1.004＜f/TTL＜1.1；及
    f为所述光学系统的有效焦距，TTL为所述第一透镜的物侧面至所述光学系统的成像面于光轴上的距离。
  2. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    1.09＜2*Imgh/TTL＜1.2；
    Imgh为所述光学系统的最大视场角所对应的像高的一半。
  3. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    1＜f123/R12＜1.8；
    f123为所述第一透镜、所述第二透镜及所述第三透镜的组合焦距，R12为所述第一透镜的像侧面于光轴处的曲率半径。
  4. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    -2.2＜f567/f＜-0.9；
    f567为所述第五透镜、所述第六透镜及所述第七透镜的组合焦距。
  5. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    1＜f/f3＜1.6；
    f3为所述第三透镜的有效焦距。
  6. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    2.5＜ct56/et56＜7；
    ct56为所述第五透镜的像侧面至所述第六透镜的物侧面于光轴上的距离，et56为所述第五透镜的像侧面最大有效孔径处至所述第六透镜的物侧面最大有效孔径处于光轴方向上的距离。
  7. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    0.4＜|sag61|/et6＜1.1；
    sag61为所述第六透镜的物侧面于最大有效孔径处的矢高，et6为所述第六透镜的物侧面最大有效孔径处至像侧面最大有效孔径处于光轴方向的厚度。
  8. 根据权利要求7所述的光学系统，其特征在于，所述光学系统进一步满足关系：
    0.455≤|sag61|/et6≤1.003。
  9. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    -3＜sag71/et7＜-1；
    sag71为所述第七透镜的物侧面于最大有效孔径处的矢高，et7为所述第七透镜的物侧面最大有效孔径处至像侧面最大有效孔径处于光轴方向的厚度。
  10. 根据权利要求9所述的光学系统，其特征在于，所述光学系统进一步满足关系：
    -2.52≤sag71/et7≤-1.16。
  11. 根据权利要求1所述的光学系统，其特征在于，所述光学系统满足关系：
    14＜f1/CT1＜23.5；
    f1为所述第一透镜的有效焦距，CT1为所述第一透镜于光轴上的厚度。
  12. 根据权利要求1所述的光学系统，其特征在于，所述光学系统进一步满足关系：
    1.005≤f/TTL≤1.092。
  13. 根据权利要求1至12任意一项所述的光学系统，其特征在于，所述光学系统包括孔径光阑，所述孔径光阑设于所述第三透镜与所述第四透镜之间。
  14. 根据权利要求1至13任意一项所述的光学系统，其特征在于，所述第一透镜至所述第七透镜中的至少一者具有非球面面型。
  15. 根据权利要求14所述的光学系统，其特征在于，所述光学系统中各透镜的物侧面及像侧面均具有非球面面型。
  16. 根据权利要求1所述的光学系统，其特征在于，所述第一透镜至所述第七透镜中至少一者的材质为塑料。
  17. 根据权利要求1所述的光学系统，其特征在于，所述第一透镜至所述第七透镜中至少一者的材质为玻璃。
  18. 根据权利要求1所述的光学系统，其特征在于，所述第一透镜、所述第二透镜、所述第四透镜及所述第五透镜的材质均为塑料，所述第三透镜、所述第六透镜及所述第七透镜的材质均为玻璃。
  19. 根据权利要求1所述的光学系统，其特征在于，所述光学系统还包括红外截止滤光片，所述红外截止滤光片设于所述第七透镜的像侧。
  20. 一种摄像模组，包括图像传感器及权利要求1至19任意一项所述的光学系统，所述图像传感器设于所述光学系统的像侧。
  21. 一种电子设备，包括固定件及权利要求20所述的摄像模组，所述摄像模组设于所述固定件。
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